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/*========================== begin_copyright_notice ============================
Copyright (C) 2025 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ===========================*/
#include "common/LLVMWarningsPush.hpp"
#include "llvmWrapper/Transforms/Scalar/DivRemPairs.h"
#include "llvm/Transforms/Scalar.h"
#include "llvm/Transforms/Scalar/DivRemPairs.h"
#include "llvm/IR/Dominators.h"
#include "llvm/Analysis/GlobalsModRef.h"
#include "llvm/Analysis/TargetTransformInfo.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/PassManager.h"
#include "llvm/IR/Value.h"
#include "llvm/Pass.h"
#include "llvm/Passes/PassBuilder.h"
#include "llvm/Transforms/Scalar.h"
#include "llvmWrapper/Transforms/InitializePasses.h"
#include "common/LLVMWarningsPop.hpp"
#include "Compiler/IGCPassSupport.h"
using namespace llvm;
namespace IGCLLVM {
DivRemPairsLegacyPassWrapper::DivRemPairsLegacyPassWrapper() : FunctionPass(ID) {
initializeDivRemPairsLegacyPassWrapperPass(*PassRegistry::getPassRegistry());
PB.registerModuleAnalyses(MAM);
PB.registerCGSCCAnalyses(CGAM);
PB.registerFunctionAnalyses(FAM);
PB.registerLoopAnalyses(LAM);
PB.crossRegisterProxies(LAM, FAM, CGAM, MAM);
}
bool DivRemPairsLegacyPassWrapper::runOnFunction(Function &F) {
// The legacy pass manager implementation of the pass used to skip some functions. In the new pass manager
// implementation this is done globally through the pass manager. Check and skip explicitly here to preserve the old
// behavior.
if (skipFunction(F))
return false;
// Run the New Pass Manager implementation of the pass. Note, there is no need to inject any analyses for
// PostDominatorTree as ADCE does not actually use it but only "requires" it to mark it as preserved.
DivRemPairsPass Implementation;
Implementation.run(F, FAM);
return true;
}
void DivRemPairsLegacyPassWrapper::getAnalysisUsage(AnalysisUsage &AU) const {
AU.addRequired<DominatorTreeWrapperPass>();
AU.addRequired<TargetTransformInfoWrapperPass>();
AU.setPreservesCFG();
AU.addPreserved<DominatorTreeWrapperPass>();
AU.addPreserved<GlobalsAAWrapperPass>();
FunctionPass::getAnalysisUsage(AU);
}
char DivRemPairsLegacyPassWrapper::ID = 0;
Pass *createLegacyWrappedDivRemPairsPass() { return new DivRemPairsLegacyPassWrapper(); }
} // namespace IGCLLVM
using namespace IGCLLVM;
#define PASS_FLAG "div-rem-pairs-legacy-wrapped"
#define PASS_DESCRIPTION "Hoist/decompose integer division and remainder LPM Wrapped"
#define PASS_CFG_ONLY false
#define PASS_ANALYSIS false
IGC_INITIALIZE_PASS_BEGIN(DivRemPairsLegacyPassWrapper, PASS_FLAG, PASS_DESCRIPTION, PASS_CFG_ONLY, PASS_ANALYSIS)
IGC_INITIALIZE_PASS_DEPENDENCY(DominatorTreeWrapperPass)
IGC_INITIALIZE_PASS_END(DivRemPairsLegacyPassWrapper, PASS_FLAG, PASS_DESCRIPTION, PASS_CFG_ONLY, PASS_ANALYSIS)
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